Sharp thresholds for the phase transition between primitive recursive and Ackermannian Ramsey numbers.

Menachem Kojman Gyesik Lee Eran Omri Andreas Weiermann Sharp thresholds for the phase transition between primitive recursive and Ackermannian Ramsey numbers. 1036-1055 2008 115 J. Comb. Theory, Ser. A 6 http://dx.doi.org/10.1016/j.jcta.2007.12.006 db/journals/jct/jcta115.html#KojmanLOW08